NBC News’ Michael Isikoff and Politico’s John Harris debate whether the negative ads financed by Mitt Romney’s Super PAC are to blame for Newt Gingrich’s decline in the polls.Jan. 4, 2012
UP NEXT
Putin speaks after winning fifth term
01:49
Michigan primary 2024: Voters head to polls in key swing state
02:34
New York congressional district votes for George Santos' replacement in Congress
01:45
Appeals court rules Trump not immune in election interference case
02:01
Robert F. Kennedy Jr.: 'I think I can win the White House'
02:19
Haley staying in race despite Trump's historic NH victory